More on blood sample

In a previous post, I described the examination of blood from subject having MS like symptoms. The last round of cultures display fungus of some sort. I have obtained this from plate cultures, and a broth culture under incubation at body temp. 37 C.
I had both plate and broth [controls], both are negative for fungal growth.
Not sure if this is relative, but earlier observations of slide preparation before testing, showed very small objects thought to be viral. I am now contemplating if they were indeed fungal metabolites. The product was too small to be spores.
Since the subject was positive for aggressive mycoplasma, and possible L form bacteria, I wonder if the fungal products are connected, or if it is a natural occurrence.
I will have to repeat the testing with my own blood to see if I get a similar result.